ECG sensor



FIG. 1 is a perspective view of the ECG sensor;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left elevational view thereof;

FIG. 5 is a right elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a reference view when a ECG sensor is in use.

The broken lines in FIG. 8 illustrate environmental subject matters and form no part of the claimed design. 

CLAIM The ornamental design for a ECG sensor, as shown and described. 